drm: remove symlinks from build, use Kbuild files for lib build

The DRM build used a separate, symlinked, source tree out of a desire
to avoid Kbuild/autotools' object files conflicting.

Not only is this very annoying to maintain, but it's made worse by
having two entirely separate source file lists to maintain too.

Fixes both these issues by ditching automake (it doesn't approve of
the kernel's Kbuild syntax) in favour of custom makefiles that can
build libnvif.so from the Kbuild files.

Like the previous commit, this will never show up in the kernel tree
(it has its own version).

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 563 insertions, 0 deletions

diff --git a/drm/nouveau/nouveau_fbcon.c b/drm/nouveau/nouveau_fbcon.c
new file mode 100644
index 000000000..d6e6958bc
--- /dev/null
+++ b/drm/nouveau/nouveau_fbcon.c
@@ -0,0 +1,563 @@
+/*
+ * Copyright © 2007 David Airlie
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *     David Airlie
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/sysrq.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/screen_info.h>
+#include <linux/vga_switcheroo.h>
+#include <linux/console.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+
+#include "nouveau_drm.h"
+#include "nouveau_gem.h"
+#include "nouveau_bo.h"
+#include "nouveau_fbcon.h"
+#include "nouveau_chan.h"
+
+#include "nouveau_crtc.h"
+
+MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration");
+int nouveau_nofbaccel = 0;
+module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400);
+
+static void
+nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	struct nouveau_fbdev *fbcon = info->par;
+	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
+	struct nvif_device *device = &drm->device;
+	int ret;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return;
+
+	ret = -ENODEV;
+	if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
+	    mutex_trylock(&drm->client.mutex)) {
+		if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
+			ret = nv04_fbcon_fillrect(info, rect);
+		else
+		if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
+			ret = nv50_fbcon_fillrect(info, rect);
+		else
+			ret = nvc0_fbcon_fillrect(info, rect);
+		mutex_unlock(&drm->client.mutex);
+	}
+
+	if (ret == 0)
+		return;
+
+	if (ret != -ENODEV)
+		nouveau_fbcon_gpu_lockup(info);
+	cfb_fillrect(info, rect);
+}
+
+static void
+nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image)
+{
+	struct nouveau_fbdev *fbcon = info->par;
+	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
+	struct nvif_device *device = &drm->device;
+	int ret;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return;
+
+	ret = -ENODEV;
+	if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
+	    mutex_trylock(&drm->client.mutex)) {
+		if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
+			ret = nv04_fbcon_copyarea(info, image);
+		else
+		if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
+			ret = nv50_fbcon_copyarea(info, image);
+		else
+			ret = nvc0_fbcon_copyarea(info, image);
+		mutex_unlock(&drm->client.mutex);
+	}
+
+	if (ret == 0)
+		return;
+
+	if (ret != -ENODEV)
+		nouveau_fbcon_gpu_lockup(info);
+	cfb_copyarea(info, image);
+}
+
+static void
+nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	struct nouveau_fbdev *fbcon = info->par;
+	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
+	struct nvif_device *device = &drm->device;
+	int ret;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return;
+
+	ret = -ENODEV;
+	if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
+	    mutex_trylock(&drm->client.mutex)) {
+		if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
+			ret = nv04_fbcon_imageblit(info, image);
+		else
+		if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
+			ret = nv50_fbcon_imageblit(info, image);
+		else
+			ret = nvc0_fbcon_imageblit(info, image);
+		mutex_unlock(&drm->client.mutex);
+	}
+
+	if (ret == 0)
+		return;
+
+	if (ret != -ENODEV)
+		nouveau_fbcon_gpu_lockup(info);
+	cfb_imageblit(info, image);
+}
+
+static int
+nouveau_fbcon_sync(struct fb_info *info)
+{
+	struct nouveau_fbdev *fbcon = info->par;
+	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
+	struct nouveau_channel *chan = drm->channel;
+	int ret;
+
+	if (!chan || !chan->accel_done || in_interrupt() ||
+	    info->state != FBINFO_STATE_RUNNING ||
+	    info->flags & FBINFO_HWACCEL_DISABLED)
+		return 0;
+
+	if (!mutex_trylock(&drm->client.mutex))
+		return 0;
+
+	ret = nouveau_channel_idle(chan);
+	mutex_unlock(&drm->client.mutex);
+	if (ret) {
+		nouveau_fbcon_gpu_lockup(info);
+		return 0;
+	}
+
+	chan->accel_done = false;
+	return 0;
+}
+
+static struct fb_ops nouveau_fbcon_ops = {
+	.owner = THIS_MODULE,
+	.fb_check_var = drm_fb_helper_check_var,
+	.fb_set_par = drm_fb_helper_set_par,
+	.fb_fillrect = nouveau_fbcon_fillrect,
+	.fb_copyarea = nouveau_fbcon_copyarea,
+	.fb_imageblit = nouveau_fbcon_imageblit,
+	.fb_sync = nouveau_fbcon_sync,
+	.fb_pan_display = drm_fb_helper_pan_display,
+	.fb_blank = drm_fb_helper_blank,
+	.fb_setcmap = drm_fb_helper_setcmap,
+	.fb_debug_enter = drm_fb_helper_debug_enter,
+	.fb_debug_leave = drm_fb_helper_debug_leave,
+};
+
+static struct fb_ops nouveau_fbcon_sw_ops = {
+	.owner = THIS_MODULE,
+	.fb_check_var = drm_fb_helper_check_var,
+	.fb_set_par = drm_fb_helper_set_par,
+	.fb_fillrect = cfb_fillrect,
+	.fb_copyarea = cfb_copyarea,
+	.fb_imageblit = cfb_imageblit,
+	.fb_pan_display = drm_fb_helper_pan_display,
+	.fb_blank = drm_fb_helper_blank,
+	.fb_setcmap = drm_fb_helper_setcmap,
+	.fb_debug_enter = drm_fb_helper_debug_enter,
+	.fb_debug_leave = drm_fb_helper_debug_leave,
+};
+
+void
+nouveau_fbcon_accel_save_disable(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	if (drm->fbcon) {
+		drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
+		drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
+	}
+}
+
+void
+nouveau_fbcon_accel_restore(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	if (drm->fbcon) {
+		drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
+	}
+}
+
+static void
+nouveau_fbcon_accel_fini(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_fbdev *fbcon = drm->fbcon;
+	if (fbcon && drm->channel) {
+		console_lock();
+		fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
+		console_unlock();
+		nouveau_channel_idle(drm->channel);
+		nvif_object_fini(&fbcon->twod);
+		nvif_object_fini(&fbcon->blit);
+		nvif_object_fini(&fbcon->gdi);
+		nvif_object_fini(&fbcon->patt);
+		nvif_object_fini(&fbcon->rop);
+		nvif_object_fini(&fbcon->clip);
+		nvif_object_fini(&fbcon->surf2d);
+	}
+}
+
+static void
+nouveau_fbcon_accel_init(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_fbdev *fbcon = drm->fbcon;
+	struct fb_info *info = fbcon->helper.fbdev;
+	int ret;
+
+	if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA)
+		ret = nv04_fbcon_accel_init(info);
+	else
+	if (drm->device.info.family < NV_DEVICE_INFO_V0_FERMI)
+		ret = nv50_fbcon_accel_init(info);
+	else
+		ret = nvc0_fbcon_accel_init(info);
+
+	if (ret == 0)
+		info->fbops = &nouveau_fbcon_ops;
+}
+
+static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
+				    u16 blue, int regno)
+{
+	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
+
+	nv_crtc->lut.r[regno] = red;
+	nv_crtc->lut.g[regno] = green;
+	nv_crtc->lut.b[regno] = blue;
+}
+
+static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
+				    u16 *blue, int regno)
+{
+	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
+
+	*red = nv_crtc->lut.r[regno];
+	*green = nv_crtc->lut.g[regno];
+	*blue = nv_crtc->lut.b[regno];
+}
+
+static void
+nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *fbcon)
+{
+	struct fb_info *info = fbcon->helper.fbdev;
+	struct fb_fillrect rect;
+
+	/* Clear the entire fbcon.  The drm will program every connector
+	 * with it's preferred mode.  If the sizes differ, one display will
+	 * quite likely have garbage around the console.
+	 */
+	rect.dx = rect.dy = 0;
+	rect.width = info->var.xres_virtual;
+	rect.height = info->var.yres_virtual;
+	rect.color = 0;
+	rect.rop = ROP_COPY;
+	info->fbops->fb_fillrect(info, &rect);
+}
+
+static int
+nouveau_fbcon_create(struct drm_fb_helper *helper,
+		     struct drm_fb_helper_surface_size *sizes)
+{
+	struct nouveau_fbdev *fbcon =
+		container_of(helper, struct nouveau_fbdev, helper);
+	struct drm_device *dev = fbcon->dev;
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nvif_device *device = &drm->device;
+	struct fb_info *info;
+	struct drm_framebuffer *fb;
+	struct nouveau_framebuffer *nouveau_fb;
+	struct nouveau_channel *chan;
+	struct nouveau_bo *nvbo;
+	struct drm_mode_fb_cmd2 mode_cmd;
+	struct pci_dev *pdev = dev->pdev;
+	int size, ret;
+
+	mode_cmd.width = sizes->surface_width;
+	mode_cmd.height = sizes->surface_height;
+
+	mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
+	mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);
+
+	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+							  sizes->surface_depth);
+
+	size = mode_cmd.pitches[0] * mode_cmd.height;
+	size = roundup(size, PAGE_SIZE);
+
+	ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM,
+			      0, 0x0000, &nvbo);
+	if (ret) {
+		NV_ERROR(drm, "failed to allocate framebuffer\n");
+		goto out;
+	}
+
+	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM, false);
+	if (ret) {
+		NV_ERROR(drm, "failed to pin fb: %d\n", ret);
+		goto out_unref;
+	}
+
+	ret = nouveau_bo_map(nvbo);
+	if (ret) {
+		NV_ERROR(drm, "failed to map fb: %d\n", ret);
+		goto out_unpin;
+	}
+
+	chan = nouveau_nofbaccel ? NULL : drm->channel;
+	if (chan && device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
+		ret = nouveau_bo_vma_add(nvbo, drm->client.vm,
+					&fbcon->nouveau_fb.vma);
+		if (ret) {
+			NV_ERROR(drm, "failed to map fb into chan: %d\n", ret);
+			chan = NULL;
+		}
+	}
+
+	mutex_lock(&dev->struct_mutex);
+
+	info = framebuffer_alloc(0, &pdev->dev);
+	if (!info) {
+		ret = -ENOMEM;
+		goto out_unlock;
+	}
+	info->skip_vt_switch = 1;
+
+	ret = fb_alloc_cmap(&info->cmap, 256, 0);
+	if (ret) {
+		ret = -ENOMEM;
+		framebuffer_release(info);
+		goto out_unlock;
+	}
+
+	info->par = fbcon;
+
+	nouveau_framebuffer_init(dev, &fbcon->nouveau_fb, &mode_cmd, nvbo);
+
+	nouveau_fb = &fbcon->nouveau_fb;
+	fb = &nouveau_fb->base;
+
+	/* setup helper */
+	fbcon->helper.fb = fb;
+	fbcon->helper.fbdev = info;
+
+	strcpy(info->fix.id, "nouveaufb");
+	if (!chan)
+		info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
+	else
+		info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
+			      FBINFO_HWACCEL_FILLRECT |
+			      FBINFO_HWACCEL_IMAGEBLIT;
+	info->flags |= FBINFO_CAN_FORCE_OUTPUT;
+	info->fbops = &nouveau_fbcon_sw_ops;
+	info->fix.smem_start = nvbo->bo.mem.bus.base +
+			       nvbo->bo.mem.bus.offset;
+	info->fix.smem_len = size;
+
+	info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
+	info->screen_size = size;
+
+	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
+	drm_fb_helper_fill_var(info, &fbcon->helper, sizes->fb_width, sizes->fb_height);
+
+	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
+
+	mutex_unlock(&dev->struct_mutex);
+
+	if (chan)
+		nouveau_fbcon_accel_init(dev);
+	nouveau_fbcon_zfill(dev, fbcon);
+
+	/* To allow resizeing without swapping buffers */
+	NV_INFO(drm, "allocated %dx%d fb: 0x%lx, bo %p\n",
+		nouveau_fb->base.width, nouveau_fb->base.height,
+		nvbo->bo.offset, nvbo);
+
+	vga_switcheroo_client_fb_set(dev->pdev, info);
+	return 0;
+
+out_unlock:
+	mutex_unlock(&dev->struct_mutex);
+	if (chan)
+		nouveau_bo_vma_del(nvbo, &fbcon->nouveau_fb.vma);
+	nouveau_bo_unmap(nvbo);
+out_unpin:
+	nouveau_bo_unpin(nvbo);
+out_unref:
+	nouveau_bo_ref(NULL, &nvbo);
+out:
+	return ret;
+}
+
+void
+nouveau_fbcon_output_poll_changed(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	if (drm->fbcon)
+		drm_fb_helper_hotplug_event(&drm->fbcon->helper);
+}
+
+static int
+nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
+{
+	struct nouveau_framebuffer *nouveau_fb = &fbcon->nouveau_fb;
+	struct fb_info *info;
+
+	if (fbcon->helper.fbdev) {
+		info = fbcon->helper.fbdev;
+		unregister_framebuffer(info);
+		if (info->cmap.len)
+			fb_dealloc_cmap(&info->cmap);
+		framebuffer_release(info);
+	}
+
+	if (nouveau_fb->nvbo) {
+		nouveau_bo_unmap(nouveau_fb->nvbo);
+		nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma);
+		nouveau_bo_unpin(nouveau_fb->nvbo);
+		drm_gem_object_unreference_unlocked(&nouveau_fb->nvbo->gem);
+		nouveau_fb->nvbo = NULL;
+	}
+	drm_fb_helper_fini(&fbcon->helper);
+	drm_framebuffer_unregister_private(&nouveau_fb->base);
+	drm_framebuffer_cleanup(&nouveau_fb->base);
+	return 0;
+}
+
+void nouveau_fbcon_gpu_lockup(struct fb_info *info)
+{
+	struct nouveau_fbdev *fbcon = info->par;
+	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
+
+	NV_ERROR(drm, "GPU lockup - switching to software fbcon\n");
+	info->flags |= FBINFO_HWACCEL_DISABLED;
+}
+
+static const struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
+	.gamma_set = nouveau_fbcon_gamma_set,
+	.gamma_get = nouveau_fbcon_gamma_get,
+	.fb_probe = nouveau_fbcon_create,
+};
+
+void
+nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	if (drm->fbcon) {
+		console_lock();
+		if (state == FBINFO_STATE_RUNNING)
+			nouveau_fbcon_accel_restore(dev);
+		fb_set_suspend(drm->fbcon->helper.fbdev, state);
+		if (state != FBINFO_STATE_RUNNING)
+			nouveau_fbcon_accel_save_disable(dev);
+		console_unlock();
+	}
+}
+
+int
+nouveau_fbcon_init(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_fbdev *fbcon;
+	int preferred_bpp;
+	int ret;
+
+	if (!dev->mode_config.num_crtc ||
+	    (dev->pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
+		return 0;
+
+	fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
+	if (!fbcon)
+		return -ENOMEM;
+
+	fbcon->dev = dev;
+	drm->fbcon = fbcon;
+
+	drm_fb_helper_prepare(dev, &fbcon->helper, &nouveau_fbcon_helper_funcs);
+
+	ret = drm_fb_helper_init(dev, &fbcon->helper,
+				 dev->mode_config.num_crtc, 4);
+	if (ret) {
+		kfree(fbcon);
+		return ret;
+	}
+
+	drm_fb_helper_single_add_all_connectors(&fbcon->helper);
+
+	if (drm->device.info.ram_size <= 32 * 1024 * 1024)
+		preferred_bpp = 8;
+	else
+	if (drm->device.info.ram_size <= 64 * 1024 * 1024)
+		preferred_bpp = 16;
+	else
+		preferred_bpp = 32;
+
+	/* disable all the possible outputs/crtcs before entering KMS mode */
+	drm_helper_disable_unused_functions(dev);
+
+	drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp);
+	return 0;
+}
+
+void
+nouveau_fbcon_fini(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+
+	if (!drm->fbcon)
+		return;
+
+	nouveau_fbcon_accel_fini(dev);
+	nouveau_fbcon_destroy(dev, drm->fbcon);
+	kfree(drm->fbcon);
+	drm->fbcon = NULL;
+}